package com.itheima.controller;

import com.itheima.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.util.UUID;

@RestController
@RequestMapping("/common")
@Slf4j
public class CommonController {

    @Value("${reggie.path}")
    private String basePath;

    @PostMapping("/upload")
    public R<String> upload(MultipartFile file) {
        log.info("上传图片...");
        log.info(file.toString());
        String originalFilename = file.getOriginalFilename();
        String suffix = originalFilename.substring(originalFilename.lastIndexOf('.'));
        String fileName = UUID.randomUUID().toString() + suffix;

        File dir = new File(basePath);
        if (! dir.exists()) {
            dir.mkdirs();
        }

        try {
            file.transferTo(new File(basePath + fileName));
        } catch (IOException e) {
            e.printStackTrace();
        }
        return R.success(fileName);
    }

    @GetMapping("/download")
    public void download(String name, HttpServletResponse response) throws FileNotFoundException {
        try {
            FileInputStream fileInputStream = new FileInputStream(basePath + name);
            BufferedInputStream bufferedInputStream = new BufferedInputStream(fileInputStream);
            ServletOutputStream outputStream = response.getOutputStream();

            response.setContentType("image/jpeg");

            int len = 0;
            byte[] bytes = new byte[1024];
            while((len = bufferedInputStream.read(bytes)) != -1){
                outputStream.write(bytes, 0, len);
            }

            outputStream.close();
            fileInputStream.close();

        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}
